Installed a CDM 1250 in a Ford Interceptor Sedan. Used the upfitter wiring harness from the car. When transmitting, a humming sound is heard on the receiving side when the car is running. Also can hear the siren through the radio while transmitting.
Thought maybe it could have been the coax so it was replaced with a new nmo style mount and cable but the problem is still there.
Any ideas?
Kevin
Thought maybe it could have been the coax so it was replaced with a new nmo style mount and cable but the problem is still there.
Any ideas?
Kevin